★EASY INSTALLATION: This electric magnetic lock consists of an electromagnet and an armature plate used for access control door locks. By attaching this to the door frame and the armature plate to the door, a current passing through the electromagnet attracts the armature plate, holding the access control door lock shut. When power off, the door will open. ★SECURE NC MODE: Unlocked when power off, locked when power on. Suitable for: wooden door, glass door, metal door, fire-proof door. Anti magnetic design, wear resistant material manufacturing. ★HIGH QUALITY MATERIALS: High quality electromagnetic material vacuum treatment, double lock body insulation treatment. The aluminum housing is made of high strength alloy and anodized. ★ LOW POWER CONSUMPTION: Comply with environmental protection requirements, low power consumption, super quiet design, no noise during operation. ★ VARIOUS UNLOCKING FUNCTION OPTIONS: Keys, manual, remote control, intelligent induction, telecontrol, and so on, directly matching with building intercom., Manufacturer: Sonew